Related Clues:

• Slack-jawed feeling
• Type of attack
• Not just jitters
• High anxiety
• Elicit a 5-Down
• Far-from-calm feeling
• Amazement, plus
• Overwhelming admiration
• Completely impress
• Be scared of
• State of shock
• Kafkaesque worry
• Cause one's jaw to drop
• Abject terror
• "The Scream" evocation